61997954 has 12 divisors (see below), whose sum is σ = 96096582. Its totient is φ = 29998080.

The previous prime is 61997953. The next prime is 61997983. The reversal of 61997954 is 45979916.

It can be written as a sum of positive squares in only one way, i.e., 57684025 + 4313929 = 7595^2 + 2077^2 .

It is a super-2 number, since 2×61997954² = 7687492600372232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61997953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14207 + ... + 18050.

Almost surely, 2^61997954 is an apocalyptic number.

61997954 is a deficient number, since it is larger than the sum of its proper divisors (34098628).

61997954 is a wasteful number, since it uses less digits than its factorization.

61997954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32321 (or 32290 counting only the distinct ones).

The product of its digits is 612360, while the sum is 50.

The square root of 61997954 is about 7873.8779518100. The cubic root of 61997954 is about 395.7848072394.

The spelling of 61997954 in words is "sixty-one million, nine hundred ninety-seven thousand, nine hundred fifty-four".