1390992951 has 8 divisors (see below), whose sum is σ = 1854852480. Its totient is φ = 927231032.

The previous prime is 1390992947. The next prime is 1390992959. The reversal of 1390992951 is 1592990931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1390992951 - 2² = 1390992947 is a prime.

It is a super-2 number, since 2×1390992951² = 3869722779463376802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1390992951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390992959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20830 + ... + 56708.

It is an arithmetic number, because the mean of its divisors is an integer number (231856560).

Almost surely, 2^1390992951 is an apocalyptic number.

1390992951 is a deficient number, since it is larger than the sum of its proper divisors (463859529).

1390992951 is a wasteful number, since it uses less digits than its factorization.

1390992951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48805.

The product of its (nonzero) digits is 196830, while the sum is 48.

The square root of 1390992951 is about 37296.0178973574. The cubic root of 1390992951 is about 1116.2847106033.

The spelling of 1390992951 in words is "one billion, three hundred ninety million, nine hundred ninety-two thousand, nine hundred fifty-one".