155477397 has 4 divisors (see below), whose sum is σ = 207303200. Its totient is φ = 103651596.

The previous prime is 155477389. The next prime is 155477407. The reversal of 155477397 is 793774551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 155477397 - 2³ = 155477389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155477317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25912897 + ... + 25912902.

It is an arithmetic number, because the mean of its divisors is an integer number (51825800).

Almost surely, 2^155477397 is an apocalyptic number.

It is an amenable number.

155477397 is a deficient number, since it is larger than the sum of its proper divisors (51825803).

155477397 is an equidigital number, since it uses as much as digits as its factorization.

155477397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51825802.

The product of its digits is 926100, while the sum is 48.

The square root of 155477397 is about 12469.0575826724. The cubic root of 155477397 is about 537.7194598331.

The spelling of 155477397 in words is "one hundred fifty-five million, four hundred seventy-seven thousand, three hundred ninety-seven".